Genesis 21:5

וַיִּקְרָא אַבְרָהָם אֶֽת־שֶׁם־בְּנוֹ הַנּֽוֹלַד־לוֹ אֲשֶׁר־יָלְדָה־לּוֹ שָׂרָה יִצְחָֽק

And Abraham called the name of his son that was born unto him, whom Sarah bore to him, Isaac.

וַיָּמָל אַבְרָהָם אֶת־יִצְחָק בְּנוֹ בֶּן־שְׁמֹנַת יָמִים כַּאֲשֶׁר צִוָּה אֹתוֹ אֱלֹהִֽים

And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him.

וַתֹּאמֶר שָׂרָה צְחֹק עָשָׂה לִי אֱלֹהִים כָּל־הַשֹּׁמֵעַ יִֽצְחַק־לִֽי

And Sarah said: ‘God hath made laughter for me; every one that heareth will laugh on account of me.’

וַתֹּאמֶר מִי מִלֵּל לְאַבְרָהָם הֵינִיקָה בָנִים שָׂרָה כִּֽי־יָלַדְתִּי בֵן לִזְקֻנָֽיו

And she said: ‘Who would have said unto Abraham, that Sarah should give children suck? for I have borne him a son in his old age.’